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<head>
    <meta charset="UTF-8">
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    <title>Document</title>
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<body>
    <script>
        
//实现以下效果
function makeMultiplier(a){
    function fn(b){
        return a*b

    }
    return fn
}
const multiplyByThree = makeMultiplier(3);
console.log(multiplyByThree(5)); // 15
console.log(multiplyByThree(10)); // 30
    </script>
</body>
</html>